References

J.D. Willson, SRELHERP staff, www.uga.edu/srelherp/lizards/phrcor.htm

John Hollister, www.herpo.com/trans-pecos/lizards/phryno.html

John Moser, USDA Forest Service, www.forestryimages.org

Leatherwood, Art. "Horned Lizard." Hand book of Texas Online. 2001. The Texas State Historical Association. 29 Mar. 2007. http://www.tsha.utexas.edu/handbook/online/articles/HH/tdhyk.html/.

M. Clark, http://whozoo.org/AnlifeSS2001/natdavid/NGD_HornedLizard.htm

Manaster, Jane. Horned Lizard. Austin Texas: University of Texas Press, 1997. 29 March 2007.

Middendorf III, George A., and Wade C. Sherbrooke. "Candid Elicitation of Blood-Squirting in a Horned Lizard." Lawrence Kansas, 1992. 519-527. 29 March 2007.

Mike T. Friggens, Project Manager, Sevilla LTER,http://sevilleta.unm.edu/data/species/reptile/socorro/profile/texas-horned-lizard-map.gif

Moody, Raymond W., et al. Iguana. 14 San Jose, CA: International Reptile Conservation Foundation, 2007. 29 March 2007.

Sherbrooke, Wade C. Horned Lizards. Ed. Earl Jackson. Phoenix, Arizona: Southwest Parks and Monuments Association, 1981. 29 March 2007.

Sherbrooke, Wade C. "Rain-Harvesting in the Lizard, Phrynosoma cornutum: Behavior and Integumental Morphology." Herpetology. 24.3 (1990): 302-308. 29 March 2007.

Texas Parks and Wildlife Department, http://www.tpwd.state.tx.us/learning/texas_nature_trackers/horned_lizard/

Todd, R. 2000. "Phrynosoma cornutum" (On-line), Animal Diversity Web. Accessed April 08, 2007 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Phrynosoma_cornutum.htm/.

Wendy Hodges, 2001, "Phrynosoma cornutum" (On-line), Digital Morphology. Accessed April 8, 2007 at http://digimorph.org/specimens/Phrynosoma_cornutum/head/.

I would just like to thank everyone for the use of their pictures and their information.